The police still haven’t found the lost child，but they’re doing all they ________．[ ]

One day we will manage to ______ the world______ this terrible disease—cancer.

My brother’s never been late for work, ______________—- _______________. He is a hard-working man.

I got up late and _____ to school without having breakfast.

This aircraft’s safety record is an _____ testament to its designers’ skill. [ ]